php 断点续传程序

function sendfile($myFile){ 

 $mm_type="application/octet-stream"; 

$fp = fopen($myFile,'rb'); 

$size = filesize($myFile); 

ob_start(); 

header("Cache-Control: public, must-revalidate"); 

header("Pragma: hack"); 

header("Content-Type: " . $mm_type); 

header('Content-Disposition: attachment; filename="'.$fname.'"'); 

header("Content-Transfer-Encoding: binary "); 
if (isset($_SERVER['HTTP_RANGE']) && ($_SERVER['HTTP_RANGE'] != "") && preg_match("/^bytes=([0-9]+)-/i", $_SERVER['HTTP_RANGE'], $match) && ($match[1] < $size)) { 

$range = $match[1]; 

fseek($fp, $range); 

header("HTTP/1.1 206 Partial Content"); 

 //header("Date: " . gmdate("D, d M Y H:i:s") . " GMT"); 

 header("Last-Modified: ".gmdate("D, d M Y H:i:s", filemtime($myFile))." GMT"); 

header("Accept-Ranges: bytes"); 

$rangesize = ($size - $range) > 0 ? ($size - $range) : 0; 

header("Content-Length:".$rangesize); 

header("Content-Range: bytes ".$range.'-'.($size-1)."/".$size); 

//header("Connection: close"." "); 
}else{ 

header("Content-Length: ".(string)($size)); 

header("Accept-Ranges: bytes"); 

$range = 0; 

} 
fpassthru($fp); 

ob_end_flush(); 
}

Array
(
    [0] => Array
        (
            [id] => 6
            [title] => 凤凰
            [bid] => 2
        )
    [1] => Array
        (
            [id] => 5
            [title] => 年康
            [bid] => 2
        )
    [2] => Array
        (
            [id] => 4
            [title] => 海鸥
            [bid] => 2
        )
    [3] => Array
        (
            [id] => 3
            [title] => 111cn.net
            [bid] => 1
        )
    [4] => Array
        (
            [id] => 2
            [title] => 中国WEB第一站
            [bid] => 1
        )
    [5] => Array
        (
            [id] => 1
            [title] => www.111cn.net
            [bid] => 1
        )
)
//方法一,直接把值取出来，并且输出

foreach($arr as $key=>$val){
      foreach($val as $k=>$val2){
               if($val2['bid']==1){//判断
                     echo  $val2['bid']."<br />";
               }    
     }
}

//方法二，把符合条件的数组再次生成数组

代码如下	复制代码
res=array();  foreach($arr as $sub){      foreach($sub as $value){           if($value==1){               array_push($res,$sub);          }       }   }

 print_r($res);
 
 //结果为
 
 Array
(
        [3] => Array
        (
            [id] => 3
            [title] => 111cn.net
            [bid] => 1
        )
    [4] => Array
        (
            [id] => 2
            [title] => 中国WEB第一站
            [bid] => 1
        )
    [5] => Array
        (
            [id] => 1
            [title] => www.111cn.net
            [bid] => 1
        )
)

防恶意刷新php实例代码是非常实例的，我们经常会为了防止一些操作而来对用户一些用户进行防恶意刷新下面我们来看看这款实例代码吧。

<?php
session_start();
$k=$_GET['k'];
$t=$_GET['t'];
$allowTime = 1800;//防刷新时间
$ip = get_client_ip();
$allowT = md5($ip.$k.$t);
if(!isset($_SESSION[$allowT]))
{
$refresh = true;
$_SESSION[$allowT] = time();
}elseif(time() - $_SESSION[$allowT]>$allowTime){
$refresh = true;
$_SESSION[$allowT] = time();
}else{
$refresh = false;
}
?>

将一个字串中含有全角的数字字符、字母、空格或\'%+-()\'字符转换为相应半角字符

<?php教程
$str = "０１２３ＡＢＣＤＦＷＳ＼＂，．？＜＞｛｝［］＊＆＾％＃＠！～（）＋－｜：；";
echo "$str";
echo "<br />";
$str = preg_replace('/xa3([xa1-xfe])/e', 'chr(ord(1)-0x80)', $str);
echo $str;
?>

/**
*
* @access public
* @param string $str 待转换字串
* @return string $str 处理后字串
*/

function make_semiangle($str)
{
$arr = array('０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4','５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9', 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E','Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J', 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O','Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T',Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y','Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd','ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i','ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n','ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's', 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x', 'ｙ' => 'y', 'ｚ' => 'z','（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[','】' => ']', '〖' => '[', '〗' => ']', '“' => '[', '”' => ']','‘' => '[', ''' => ']', '｛' => '{', '｝' => '}', '《' => '<','》' => '>','％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-','：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.', '；' => ',', '？' => '?', '！' => '!', '…' => '-', '‖' => '|', '”' => '"', ''' => '`', '‘' => '`', '｜' => '|', '〃' => '"','　' => ' ');
return strtr($str, $arr);
}

中文,验证,php代码,实例

编码范围1. GBK (GB2312/GB18030)

ps教程: 韩文是大于[u9fa5]的字符
正则例子:
preg_replace(”/([x80-xff])/”,”",$str);
preg_replace(”/([u4e00-u9fa5])/”,”",$str);

 

x00-xff GBK双字节编码范围
x20-x7f ASCII
xa1-xff 中文
x80-xff 中文

 

2. UTF-8 (Unicode)
u4e00-u9fa5 (中文)
x3130-x318F (韩文
xAC00-xD7A3 (韩文)
u0800-u4e00 (日文)

 

//判断内容里有没有中文-GBK (PHP)
function check_is_chinese($s){
return preg_match('/[x80-xff]./', $s);
}

 

获取字符长度，中文算一个字符
//获取字符串长度-GBK (PHP)

function gb_strlen($str){
$count = 0;
for($i=0; $i<strlen($str); $i++){
$s = substr($str, $i, 1);
if (preg_match("/[x80-xff]/", $s)) ++$i;
++$count;
}
return $count;
}

 

//统计字符串长度-UTF8 (PHP)
function utf8_strlen($str) {
$count = 0;
for($i = 0; $i < strlen($str); $i++){
$value = ord($str[$i]);
if($value > 127) {
$count++;
if($value >= 192 && $value <= 223) $i++;
elseif($value >= 224 && $value <= 239) $i = $i + 2;
elseif($value >= 240 && $value <= 247) $i = $i + 3;
else die('Not a UTF-8 compatible string');
}
$count++;
}
return $count;
}

 

//截取字符串字串-GBK (PHP)
function gb_substr($str, $len){
$count = 0;
for($i=0; $i<strlen($str); $i++){
if($count == $len) break;
if(preg_match("/[x80-xff]/", substr($str, $i, 1))) ++$i;
++$count;
}
return substr($str, 0, $i);
}
//截取字符串-UTF8(PHP)
function utf8_substr($str,$position,$length){
$start_position = strlen($str);
$start_byte = 0;
$end_position = strlen($str);
$count = 0;
for($i = 0; $i < strlen($str); $i++){
if($count >= $position && $start_position > $i){
$start_position = $i;
$start_byte = $count;
}
if(($count-$start_byte)>=$length) {
$end_position = $i;
break;
}
$value = ord($str[$i]);
if($value > 127){
$count++;
if($value >= 192 && $value <= 223) $i++;
elseif($value >= 224 && $value <= 239) $i = $i + 2;
elseif($value >= 240 && $value <= 247) $i = $i + 3;
else die('Not a UTF-8 compatible string');
}
$count++;
}
return(substr($str,$start_position,$end_position-$start_position));
}

//判断是否有中文字符-GBK (JavaScript)

function check_chinese_char(s){
return (s.length != s.replace(/[^x00-xff]/g,"**").length);
}

//判断是否是有韩文-UTF-8 (JavaScript)

function checkKoreaChar(str) {
for(i=0; i<str.length; i++) {
if(((str.charCodeAt(i) > 0x3130 && str.charCodeAt(i) < 0x318F) || (str.charCodeAt(i) >= 0xAC00 && str.charCodeAt(i) <= 0xD7A3))) {
return true;
}
}
return false;
}